To provide an image processing apparatus and method and the program thereof, for implementing image processing capable of expressing the feeling of being inside fluid in a realistic manner.

A placement process part 303a places an object of a floating object in fluid (seawater) at a predetermined position within a virtual space in order to express the fluid (seawater) displayed in the virtual space. A data storage part 303b stores motion data or the like that defines the motion of the object as information about the object. A motion process part 303c reads the object's motion data from the data storage part 303b, and based on the motion data read, moves the object placed by the placement process part 303a.